The Educational Equity Center (EEC) at FHI 360 through a grant from the National Science Foundation has developed Great Science for Girls: Extension Services for Gender Equity in Science through After School Programs (GSG), to provide inquiry-based, informal science learning programs that will stimulate girls’ curiosity, interest and persistence in STEM and break down the barriers of gender stereotyping. Working with intermediaries (organizations that provide training and technical assistance to afterschool programs in their region) around the country GSG delivers curricula, research, and professional development and consulting services to help promote the concept that science is, indeed, a “girl thing.”